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图拉正粘病毒的 RNA 复制位点位于经重排的高尔基网络内。

The RNA Replication Site of Tula Orthohantavirus Resides within a Remodelled Golgi Network.

机构信息

School of Molecular and Cellular Biology, University of Leeds, Leeds LS2 9JT, UK.

National Infection Service, Public Health England, Porton Down, Salisbury SP4 0JG, UK.

出版信息

Cells. 2020 Jun 27;9(7):1569. doi: 10.3390/cells9071569.

Abstract

The family within the order comprises tri-segmented negative sense RNA viruses, many of which are rodent-borne emerging pathogens associated with fatal human disease. In contrast, hantavirus infection of corresponding rodent hosts results in inapparent or latent infections, which can be recapitulated in cultured cells that become persistently infected. In this study, we used Tula virus (TULV) to investigate the location of hantavirus replication during early, peak and persistent phases of infection, over a 30-day time course. Using immunofluorescent (IF) microscopy, we showed that the TULV nucleocapsid protein (NP) is distributed within both punctate and filamentous structures, with the latter increasing in size as the infection progresses. Transmission electron microscopy of TULV-infected cell sections revealed these filamentous structures comprised aligned clusters of filament bundles. The filamentous NP-associated structures increasingly co-localized with the Golgi and with the stress granule marker TIA-1 over the infection time course, suggesting a redistribution of these cellular organelles. The analysis of the intracellular distribution of TULV RNAs using fluorescent in-situ hybridization revealed that both genomic and mRNAs co-localized with Golgi-associated filamentous compartments that were positive for TIA. These results show that TULV induces a dramatic reorganization of the intracellular environment, including the establishment of TULV RNA synthesis factories in re-modelled Golgi compartments.

摘要

该目中包含三段负义 RNA 病毒,其中许多是与致命人类疾病相关的啮齿动物传播新兴病原体。相比之下,汉坦病毒感染相应的啮齿动物宿主会导致无症状或潜伏感染,这种感染可以在持续感染的培养细胞中重现。在这项研究中,我们使用图拉病毒(TULV)来研究感染早期、高峰期和持续期病毒复制的位置,时间跨度为 30 天。通过免疫荧光(IF)显微镜,我们发现 TULV 核衣壳蛋白(NP)分布在点状和丝状结构中,随着感染的进展,后者的大小增加。TULV 感染细胞切片的透射电子显微镜显示,这些丝状结构由排列整齐的丝状束簇组成。随着感染时间的推移,丝状 NP 相关结构与高尔基体和应激颗粒标记物 TIA-1 的共定位越来越多,这表明这些细胞细胞器发生了再分布。使用荧光原位杂交分析 TULV RNA 的细胞内分布显示,基因组和 mRNA 均与高尔基体相关的丝状隔室共定位,这些隔室对 TIA 呈阳性。这些结果表明,TULV 诱导了细胞内环境的剧烈重组,包括在重新构建的高尔基体隔室中建立 TULV RNA 合成工厂。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f24/7408811/63b0de432aa5/cells-09-01569-g001.jpg

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